analysis/webservice/algorithms/Heartbeat.py

# Licensed to the Apache Software Foundation (ASF) under one or more
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# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
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import json

from webservice.NexusHandler import nexus_handler
from webservice.algorithms.NexusCalcHandler import NexusCalcHandler


@nexus_handler
class HeartbeatCalcHandlerImpl(NexusCalcHandler):
    name = "Backend Services Status"
    path = "/heartbeat"
    description = "Returns health status of Nexus backend services"
    params = {}
    singleton = True

    def calc(self, computeOptions, **args):
        status = self._get_tile_service().heartbeat()

        class SimpleResult(object):
            def __init__(self, result):
                self.result = result

            def toJson(self):
                return json.dumps(self.result)

        return SimpleResult(status)